Chemical composition of rare garnets, their colours and gemmological characteristics

Irena Balčiūnaitė; Arūnas Kleišmantas; Eugenijus Norkus

doi:10.6001/chemija.2015.26.1.3

Irena Balčiūnaitė
Arūnas Kleišmantas
Eugenijus Norkus

DOI: https://doi.org/10.6001/chemija.2015.26.1.3

Keywords: garnets, tsavorite, blue colour-change garnets, demantoid and rainbow garnets

Abstract

The article describes the rare garnet chemical composition, the colour, the dependence on chemical elements and gemmological features. Chemical analysis of the garnet group minerals was performed with a Quanta 250/450/650 scanning electronic microscope, using an apparatus for coating the samples with metals Emitech SC7620 Mini Sputter Coater with a CA7625 attachment for carbon coating.